GNU Wget is a free software package for retrieving files using HTTP, HTTPS and FTP, the most widely-used Internet protocols. It is a non-interactive commandline tool, so it may easily be called from scripts, etc...

GNU Wget has many features to make retrieving large files or mirroring entire web or FTP sites easy, including:

Can resume aborted downloads, using REST and RANGE

Can use filename wild cards and recursively mirror directories

Optionally converts absolute links in downloaded documents to relative, so that downloaded documents may link to each other locally

Supports HTTP and SOCKS proxies

Supports HTTP cookies

Supports persistent HTTP connections

Unattended / background operation

Uses local file timestamps to determine whether documents need to be re-downloaded when mirroring

The OpenSSL Project is a collaborative effort to develop a robust, commercial-grade, full-featured, and Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as a full-strength general purpose cryptography library. The project is managed by a worldwide community of volunteers that use the Internet to communicate, plan, and develop the OpenSSL toolkit and its related documentation.

Tired of reaching for your volume knob every time your mp3 player changes to a new song? MP3Gain analyzes and adjusts mp3 files so that they have the same volume.

MP3Gain does not just do peak normalization, as many normalizers do. Instead, it does some statistical analysis to determine how loud the file actually sounds to the human ear. Also, the changes MP3Gain makes are completely lossless. There is no quality lost in the change because the program adjusts the mp3 file directly, without decoding and re-encoding.

normalize is a tool for adjusting the volume of audio files to a standard level. This is useful for things like creating mixed CD's and mp3 collections, where different recording levels on different albums can cause the volume to vary greatly from song to song.

This build is compiled with libmad & audofile, so mp3, aiff, next and iff (8bit, mono) and some more can be normalized too.

vorbis-tools 1.4.0 is the first official release of vorbis-tools since 1.2.x. 1.3.x was never offered as an official snapshot, though various versions were widely deployed as patch-sets by distributions.

OptiPNG is a PNG optimizer that recompresses image files to a smaller size, without losing any information. This program also converts external formats (BMP, GIF, PNM and TIFF) to optimized PNG, and performs PNG integrity checks and corrections. If you wish to learn how PNG optimization is done, or to know about other similar tools, read the PNG-Tech article "A guide to PNG optimization".

LAME is an LGPL MP3 encoder. The Open source development model allowed to improve its quality and speed since 1999. It is now an highly evolved MP3 encoder, with quality and speed able to rival state of the art commercial encoders.

LAME features:

Many improvements in quality in speed over ISO reference software. See history.

MPEG1,2 and 2.5 layer III encoding.

CBR (constant bitrate) and two types of variable bitrate, VBR and ABR.

Simple DirectMedia Layer is a cross-platform multimedia library designed to provide low level access to audio, keyboard, mouse, joystick, 3D hardware via OpenGL, and 2D video framebuffer. It is used by MPEG playback software, emulators, and many popular games, including the award winning Linux port of "Civilization: Call To Power."